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Plumbing Test Question and Answers.
Which of the following traps are permitted by special permission? A. bell B. S C. drum D. crown vented trap - ANSWER C A roof mounted ari conditioner unit is condensing at the rate of 5 GPM. How much DFU? A. 4 B. 5 C. 10 D. 12 - ANSWER B According to the International Plumbing Code, when plastic piping is installed in a concealed location and passing through a stud joist or rafter, the piping may not pass any closer than ___ inches from the edge of the wood member. A. 3/ B. 1 C. 1 1/ D. 1 1/2 - ANSWER D The measured length along the centerline of the pip and its fittings is? A. true length B. measured length C. developed length D. actual length - ANSWER C What is the approximated number of threads for a 2 1/2" schedule 40 pipe which will be used in a fuel gas piping system? A. 9 B. 10 C. 11 D. 12 - ANSWER D .43 PSI = How many Feet of Head? A. 1 B. 2. C. 4. D. 43 - ANSWER A
What is the PSI at the bottom of the drainage pipe if the test for a 4" drainage system is 30' of head? A. 15 psi B. 14 psi C. 13 psi D. 12 psi - ANSWER D PSI = feet of head x. 30 (feet of head) x .433 = 12. When gas piping is installed through wood studs and is less than 1 1/4" from the nearest end of the stud, the point of passage shall be protected with a face plate not less than ___. A. 1/ B. 1/ C. 3/ D. 1/8 - ANSWER B What is the corresponding feet of head in a sprinkler system whose pressure is 40 PSI? A. 93 B. 112 C. 117 D. 116 - ANSWER A Feet of head is 2.31 x PSI 40 x 2.325= 93 A multimeter would test for which of the following? A. current B. CFM C. CFH D. gallons per hour - ANSWER A How is the vent from an indirect waste pipe run to the outside? A. separately, unconnected B. within an approved partition C. vertically only D. may be jointed to another vent prior to exiting the roof as long as the joining is above the ceiling - ANSWER A If the claim be for the planting of any trees, vines, plants or hedge, the lien must be filed within 4 months of the ___. A. planting B. purchase C. contract signing D. delivery - ANSWER A
ASSUME the main is standing with 42' of head. - ANSWER B 42' x .433 = 18. Corrosive liquids shall not be discharged into the drainage system A. without being doused B. without being diluted C. not permitted D. without prior treatment - ANSWER B How high above the floor of a garage must a water heater be installed? A. 12" B. 16" C. 18" D. 24" - ANSWER C How high above overflow tube of a tank type water closet must the ball cock be located? A. 2" B. 1" C. 3" D. 4" - ANSWER B What is the air pressure test for a new water piping system? A. 50 PSI for 30 minutes B. 15 PSI for 15 minutes C. 40 PSI for 15 minutes D. 12 PSI for 30 minutes - ANSWER A According to Table G109.1.2(1) in the IPC, a 1' long semi rigid connector of 3/8" OD can carry ___ Btuh. A. 25, B. 35, C. 40, D. 50,000 - ANSWER C Joints between differing pipe materials shall be: A. stainless steel adaptors B. approved adaptor fittings C. brass couplings D. schedule 80 PVC - ANSWER B According to the IPC, the maximum length of a fuel connector to a dryer is: A. 3' B. 4' C. 5'
D. 6' - ANSWER D
According to the IPC, and disregarding exceptions, the maximum length of an appliance fuel connector shall be: A. 3' B. 4' C. 5' D. 6' - ANSWER A Appeals may not be taken on lien matters. A. True B. False - ANSWER B The person upon whom a lien is placed, if he loses, my pay reasonable attorney's fees and all court costs. A. True B. False - ANSWER A Any person agains whom a lien claim is filed may at any time upon ___ days written notice ___ with the ___. A. 3, post a bond, county clerk B. 5, pay the balance due, certified check C. 3, form an escrow account, bank D. 5, post a bond, county clerk - ANSWER A Hard drawn copper tubing must bear a 1/4" stripe in indelible ink to mark its type. Type L copper tubing is identified by what color stripe? A. red B. blue C. green D. yellow - ANSWER B An excavated trench 30' long, 3' wide and 2' deep. If soil swell is ignored, how much clean fill is required to fill the trench? A. 6-7 cubic yards B. 7-8 cubic yards C. 8-9 cubic yards D. 9-10 cubic yards - ANSWER A A pip which makes an angle of not more than 45 degrees to the vertical is known as? A. a vertical pipe B. a horizontal pipe C. an obtuse angle D. acute angle - ANSWER A
According to the International Plumbing Code, the horizontal wet venting of sinks or floor drains by means of a common waste and vent pipe, adequately sized to provide free movement of air above the flow line is __. A. combination waste and vent system B. wet drain section C. wet vent section D. combination drain section - ANSWER A Premiums for workers' compensation are based on all of the following except: A. associated with the business B. type of business C. employer's annual payroll D. age of employee - ANSWER D What is considered excessive water pressure? A. over 80 PSI B. over 70 PSI C. over 75 PSI D. over 15 PSI - ANSWER A What is the requirement in the water supply when the pressure at the street exceeds 80 PSI? A. pressure regulator B. approved pressure regulator C. building occupancy permit D. an engineer's approval - ANSWER B According to the International Plumbing Code, the maximum trap loading for a 2" trap is ___ DFU. A. 2 B. 3 C. 4 D. 5 - ANSWER B A pipe which makes an angle of not more than 45 degrees to the horizontal is known as: A. a horizontal pipe B. a vertical pipe C. an acute angle D. an obtuse angle - ANSWER A What is the unintended flow of liquid into potable water called? A. poor plumbing B. cross connection C. backflow D. direct connection - ANSWER C
A joint obtained between pipe and fittings which is NOT screwed, caulked, threaded, soldered, solvent cemented, or welded is: A. field fabricated B. mechanical C. non-existent D. brazed - ANSWER B The notice to the owner that a lien can be placed, shall include ___. A. a general statement to this fact. B. specific language as stated in Ch. 3 of the OK lien laws. C. your contractor license number D. the owner's and contractor's name - ANSWER OK Lien law section 142. What is the minimum clearance for cleanouts in piping larger than 8"? A. 12" B. 18" C. 24" D. 36" - ANSWER D When may a vertical waste pipe be used as a combination waste & vent? A. when used for a shower B. not permitted C. when used in a tub D. as a tailpiece - ANSWER D Surface bodies of water and land cisterns shall not be sources of individual water supply unless properly treated by approved means to prevent ___. - ANSWER contamination Unless otherwise provided in this code, ___ water shall be supplied to all plumbing fixtures. - ANSWER potable The maximum flow rate for a water closet is ___ gallons per flushing cycle. - ANSWER 1.6 gallons per flush For unlisted equipment having draft hoods, the thimble shall be not less than ___ inches larger in diameter than the vent connector. - ANSWER 6 in. Appliance shutoff valves shall be located in the same room as the appliance, not further than ___ feet from the appliance. - ANSWER 6 ft. And shall be installed upstream from the union, connector or quick disconnect device it serves. Such shutoff valves shall be provided with access. Each appliance shall be provided with a shutoff valve ___ from the appliance. - ANSWER separate
Appliances located in private garages shall be installed with a minimum clearance of ___ feet above the floor. - ANSWER 6 ft. Read the exception in this section. Appliances located in public garages, service stations, repair garages or other areas frequented by motor vehicles, shall be installed a minimum of ___ feet above the floor. - ANSWER 8 ft. Read the exception in the section. Equipment and appliances having an ignition source shall be elevated such that the source of ignition is not less than ___ inches above the floor in hazardous locations. - ANSWER 18 in. Review the new exception in this section. Manufacturer's installation instructions shall be ___ on the job site at the time of inspection. - ANSWER available If the design and free area of louvers are not known, it shall be assumed that metal louvers and grilles will have ___ - percent free area. - ANSWER 75 % If the design and free area of louvers are not known, it shall be assumed that wood lovers will have ___ - percent free area. - ANSWER 25 % Where combustion air is provided by the building's mechanical ventilation system, the system shall provide the specified combustion air rate in ___ to the required ventilation air. - ANSWER addition One permanent opening shall have a minimum free area of 1 square inch per ___ Btu per hour of the total input rating of all equipment located in the enclosure. - ANSWER 3000 Btu per hour And not less than the sum of the areas of all vent connectors in the space. Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1 square inch per ___ Btu per hour of total input rating of all equipment in the enclosure. - ANSWER 2000 Btu per hour Where directly communicating with the outdoors, each opening shall have a minimum free area of 1 square inch per ___ Btu per hour of total input rating of all equipment in the enclosure. - ANSWER 4000 Btu per hour Or where communicating with the outdoors through vertical ducts.
When using two openings to connect indoor spaces, one opening shall commence within ___ inches of the top, and one opening shall commence within ___ inches of the bottom of the enclosure. - ANSWER 12 in. 12 in. The minimum dimension of air openings shall be not less than ___ inches. - ANSWER 3 in. The number of threads to be cut in 3/4" iron pipe is ___? - ANSWER 10 Review and know how to use this table. Threaded fittings in sizes larger than ___ inches shall not be used except where approved. - ANSWER 4 in. Review this section for more fitting requirements. Piping shall ___ be installed in or through a circulating air duct, clothes chute, chimney or gas vent, ventilating duct, dumbwaiter, or elevator shaft. - ANSWER not Concealed piping shall ___ be located in solid partitions and solid walls, unless installed in a chase or casing. - ANSWER not Underground piping, where installed below grade though the outer foundation or basement wall of a building, shall be ___ in a protective pipe sleeve. - ANSWER encased Underground piping systems shall be installed a minimum depth of ___ inches below grade. - ANSWER 12 in. Plastic pipe shall be installed outside ___ only. - ANSWER underground A yellow insulated copper tracer wire or other approved conductor shall be installed ___ to underground nonmetallic piping. - ANSWER adjacent The tracer wire size shall not be less than 18 AWG and the insulation type shall be suitabl for direct burial. Metallic pipe bends shall be made only with bending equipment and procedures intended for that ___. - ANSWER purpose Review the other 4 requirements in this section. The holder of the permit shall be responsible for the ___ of inspections. - ANSWER scheduling
Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements. the most ___ shall govern. - ANSWER restrictive Domestic food wasted grinders shall be connected to a drain of not less than ___ inches in diameter. - ANSWER 1.5 in. Waste outlets serving showers shall be at least ___ inches in diameter. - ANSWER 1 1/2 in. Vent pipes shall not be less than ___ inch in diameter. - ANSWER 1 1/4 in. Water closet compartments shall not be less than ___ inches wide or ___ inches deep. - ANSWER 30 in. x 60 in. There shall be at least ___ inches clearance in front of the water closet, urinal or bidet to any wall, fixture or door. - ANSWER 21 in. A water closet, lavatory or bidet shall not be closer than ___ inches from its center to any side wall, partition, vanity or other obstruction. - ANSWER 15 in. What is the minimum clearance for 2" and less cleanout? A. 10" B. 18" C. 24" D. 12" - ANSWER B An apartment complex of 40 units contains gas ranges and water heaters. What multiplier is used to find the derated connected load? A.. B.. C.. D. .24 - ANSWER B What kind of vertical piping requires the fewest number of supports? A. soldered B. brazed C. welded D. steel - ANSWER D According to the International Plumbing Code, copper piping may be installed in wood studs, joists and rafters by using all of the following penetration methods except: A. notch 1 1/2" deep B. bored hole no closer than 1 1/2" from edge C. bored hole 1 1/4" from the edge with a 1/16" steel protective shield D. notch of 1 1/4" deep - ANSWER D
What is the arrangement of pipes or fixtures whereby backflow can occur called? A. vacuum breaker B. backflow C. backwater connection D. cross connection - ANSWER D What is meant by having access without removing a panel? A. readily accessible B. accessible C. not accessible D. panel access - ANSWER A What size circle must a shower stall be able to encompass? A. 48" B. 24" C. 36" D. 30" - ANSWER D How many BTUs are required to heat 30 gallons of water from 55 to 95 degrees F? A. 1200 B. 8976 C. 9960 D. 12960 - ANSWER D Btu = Pounds of water X change in temperature in degrees F. 30 gallons X 8.33 pounds per gallon X 40 degrees F. 30 X 8.33 X 40 = 9960 BTU What causes backflow? A. positive pressure B. drainage pipe running uphill C. drainage pipe not properly sloped D. back pressure - ANSWER D What is the vertical pip between any 2 consecutive inlet levels of a drainage system called? A. stack vent B. combination wet vent section C. combination drain & vent D. wet vent section - ANSWER D What is the minimum depth of a trap seal? A. 3 1/2" B. 4" C. 3"
